nautilus_databento/
common.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2026 Nautech Systems Pty Ltd. All rights reserved.
3//  https://nautechsystems.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16//! Common functions to support Databento adapter operations.
17
18use std::fmt::Debug;
19
20use databento::historical::DateTimeRange;
21use nautilus_core::{UnixNanos, string::secret::REDACTED};
22use time::OffsetDateTime;
23use zeroize::ZeroizeOnDrop;
24
25pub const DATABENTO: &str = "DATABENTO";
26pub const ALL_SYMBOLS: &str = "ALL_SYMBOLS";
27
28/// API credentials required for Databento API requests.
29#[derive(Clone, ZeroizeOnDrop)]
30pub struct Credential {
31    api_key: Box<[u8]>,
32}
33
34impl Debug for Credential {
35    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
36        f.debug_struct(stringify!(Credential))
37            .field("api_key", &REDACTED)
38            .finish()
39    }
40}
41
42impl Credential {
43    /// Creates a new [`Credential`] instance from the API key.
44    #[must_use]
45    pub fn new(api_key: impl Into<String>) -> Self {
46        let api_key_bytes = api_key.into().into_bytes();
47
48        Self {
49            api_key: api_key_bytes.into_boxed_slice(),
50        }
51    }
52
53    /// Returns the API key associated with this credential.
54    ///
55    /// # Panics
56    ///
57    /// This method should never panic as the API key is always valid UTF-8,
58    /// having been created from a String.
59    #[must_use]
60    pub fn api_key(&self) -> &str {
61        std::str::from_utf8(&self.api_key).expect("API key is valid UTF-8")
62    }
63
64    /// Returns a masked version of the API key for logging purposes.
65    ///
66    /// Shows first 4 and last 4 characters with ellipsis in between.
67    /// For keys shorter than 8 characters, shows asterisks only.
68    #[must_use]
69    pub fn api_key_masked(&self) -> String {
70        nautilus_core::string::secret::mask_api_key(self.api_key())
71    }
72}
73
74/// # Errors
75///
76/// Returns an error if converting `start` or `end` to `OffsetDateTime` fails.
77pub fn get_date_time_range(start: UnixNanos, end: UnixNanos) -> anyhow::Result<DateTimeRange> {
78    Ok(DateTimeRange::from((
79        OffsetDateTime::from_unix_timestamp_nanos(i128::from(start.as_u64()))?,
80        OffsetDateTime::from_unix_timestamp_nanos(i128::from(end.as_u64()))?,
81    )))
82}
83
84#[cfg(test)]
85mod tests {
86    use rstest::*;
87
88    use super::*;
89
90    #[rstest]
91    #[case(
92        UnixNanos::default(),
93        UnixNanos::default(),
94        "DateTimeRange { start: 1970-01-01 0:00:00.0 +00:00:00, end: 1970-01-01 0:00:00.0 +00:00:00 }"
95    )]
96    #[case(UnixNanos::default(), 1_000_000_000.into(), "DateTimeRange { start: 1970-01-01 0:00:00.0 +00:00:00, end: 1970-01-01 0:00:01.0 +00:00:00 }")]
97    fn test_get_date_time_range(
98        #[case] start: UnixNanos,
99        #[case] end: UnixNanos,
100        #[case] range_str: &str,
101    ) {
102        let range = get_date_time_range(start, end).unwrap();
103        assert_eq!(format!("{range:?}"), range_str);
104    }
105
106    #[rstest]
107    fn test_credential_api_key_masked_short() {
108        let credential = Credential::new("short");
109        assert_eq!(credential.api_key_masked(), "*****");
110    }
111
112    #[rstest]
113    fn test_credential_api_key_masked_long() {
114        let credential = Credential::new("abcdefghijklmnop");
115        assert_eq!(credential.api_key_masked(), "abcd...mnop");
116    }
117
118    #[rstest]
119    fn test_credential_debug_redaction() {
120        let credential = Credential::new("test_api_key");
121        let debug_str = format!("{credential:?}");
122        assert!(debug_str.contains(REDACTED));
123        assert!(!debug_str.contains("test_api_key"));
124    }
125}
nautilus_databento/common.rs

nautilus_databento/
common.rs
